WebIn the 1989 Loma Prieta quake, the Marina District building collapses were extensive, and numerous destructive fires broke out, due to all but which one of the following? This Fact Sheet describes post-earthquake products and tools provided by the Advanced National Seismic System (ANSS) through the U.S. Geological Survey Earthquake Hazards Program. Cars on the upper deck were tossed around violently, some of them flipped sideways and some of them were left dangling at the edge of the freeway. This became a political issue in the following days. The earthquake took the lives of many, leaving thousands injured. In 1989, the Loma Prieta earthquake severely damaged the Bay Bridge. 1989 World Series Game 3, causing the series to be postponed due to safety concerns and loss of electricity. Minor lateral spreading was also seen along the shores of San Francisco Bay and to the south near Monterey Bay. There were no seismic activity in that area for years, therefore tension built up over a very long period, resulting in an earthquake. From the Archives: ABC7's Peabody Award winning coverage of 1989 Loma Prieta Earthquake; Since the bay was only two blocks from the burning buildings,[53] water from the bay was pumped by the fireboat Phoenix, to engines on the shore, and from there sprayed on the fire. [18] In addition, there were 3,757 injuries as a result of the earthquake, 400 of which were serious. Other effects included sand volcanoes, landslides and ground ruptures. "[62] At that moment, the signal from Candlestick Park was lost.[93]. Find many great new & used options and get the best deals for Earthquake in Loma Prieta, California 1989 William, Harkins, Susa at the best online prices at eBay! The catastrophic natural disaster also struck the. Secondly, slip type could vary from event to event. Because the rupture took place bilaterally, the duration of strong shaking was about half of what it would have been had it ruptured in one direction only. Schultz, S., and R. Wallace, The San Andreas Fault, USGS General Interest Publication, 1989. WebThe map shows earthquakes that occurred in central California between January and No vember 1989. Because of the limited digital range [37] There were structural failures of twin bridges across Struve Slough near Watsonville. Th, Professional Paper 1551 describes the effects at the land surface caused by the Loma Prieta earthquake. When was the last time this released energy? Jim Miklaszewski and Bob Hager covered disaster response from Washington. [37] The Ford's department store in Watsonville experienced significant damage, including a crack down the front of the building. [66] Traffic on both decks came to a halt, blocked by the section of the roadbed. WebOn October 17, 1989 at 5:04 PM Pacific Time, a 6.9 magnitude earthquake struck the Bay Area of Northern California. The area includes the communities of San Jose, Campbell, Cupertino, Los Altos, Los Gatos Milpitas, Mountain View, Palo Alto, Santa Clara, Saratoga, and Sunnyvale. [8][14], The June 27, 1988, shock occurred with a maximum intensity of VI (Strong). [80] After 78 hours, 96 percent of Muni services were back in operation, including the cable cars. WebOn what date did the 1989 Loma Prieta earthquake occur? [99] There had also been a seismic-strengthening project previously completed on the upper deck concrete windscreen that may have prevented large numbers of injuries in the event of serious damage or even a catastrophic collapse. There is not one magnitude above which damage will occur. 0000006077 00000 n [63], The 1989 World Series featured the Oakland Athletics and the San Francisco Giants in the first cross-town World Series since 1956. Earthquake information products and tools from the Advanced National Seismic System (ANSS), An open repository of earthquake-triggered ground-failure inventories, Understanding earthquake hazards in urban areas - Evansville Area Earthquake Hazards Mapping Project, Liquefaction probability curves for surficial geologic deposits, Liquefaction hazard for the region of Evansville, Indiana, Liquefaction and other ground failures in Imperial County, California, from the April 4, 2010, El Mayor-Cucapah earthquake, A magnitude 7.1 earthquake in the Tacoma Fault Zone A plausible scenario for the southern Puget Sound region, Washington, The MW 7.0 Haiti Earthquake of January 12, 2010: USGS/EERI Advance Reconnaissance Team Report, Liquefaction hazard maps for three earthquake scenarios for the communities of San Jose, Campbell, Cupertino, Los Altos, Los Gatos, Milpitas, Mountain View, Palo Alto, Santa Clara, Saratoga, and Sunnyvale, Northern Santa Clara County, California, Use of liquefaction-induced features for paleoseismic analysis - An overview of how seismic liquefaction features can be distinguished from other features and how their regional distribution and properties of source sediment can be used to infer the locat, The Loma Prieta, California, Earthquake of October 17, 1989: Strong ground motion and ground failure. The water level might remain higher or lower for a period of time after the seismic waves end, but sometimes a long-term offset of groundwater levels follows an earthquake. The shaking will feel violent and it will be difficult to stand up. [23][51][67] Caltrans removed and replaced the collapsed section, and re-opened the bridge on November 18. For the latter event, peak ground accelerations range from 0.13 gravity to 0.81 gravity, sufficiently high to be of concern for liquefaction. Bar none! Water quality can also be affected by earthquakes, typically in Two sources for photographs that show earthquake damage are: Earthquake Hazards Program - Earthquake Photo Collections U.S. Geological Survey Photographic Library (see 'earthquakes' in the categories left column). of the 16-bit systems, all of these instruments "clipped". Other areas with certain soil conditions were susceptible to site amplification due to the effects of liquefaction, especially near the shore of San Francisco Bay (where its effects were severe in the Marina District) and to the west of the epicenter near rivers and other bodies of water. [40], The quake caused an estimated $6 billion[19] (equivalent to $14 billion today) in property damage, becoming one of the most expensive natural disasters in U.S. history at the time. We expect [36] Liquefaction also caused damage in the Watsonville area. When electrical power to the stadium was lost, someone drove a police car onto the field, where an officer used the car's public address system to advise that the game had been postponed. 0000001412 00000 n 0000001580 00000 n At what magnitude does damage begin to occur in an earthquake? The first is that the geometry of the San Andreas Fault goes through a transition every several thousand years. [50], The worst disaster of the earthquake was the collapse of the double-deck Cypress Street Viaduct of Interstate 880 in West Oakland. [9], Gregory Beroza, a seismologist with Stanford University, made several distinctions regarding the 1906 and 1989 events. Seismological Laboratory operated a small network of 16-bit digital seismometers. [58] Santa Cruz beach lifeguards assisted in moving the victims. [65], The San FranciscoOakland Bay Bridge suffered severe damage, as a 76-by-50-foot (23m 15m) section of the upper deck on the eastern cantilever side fell onto the deck below. In the magnitude 6.9 Loma Prieta earthquake of 1989, a brick wall in San Francisco fell onto a parking lot, leaving cars crushed; five people died. [8][13], The ML 5.3 June 1988 and the ML 5.4 August 1989 events also occurred on previously unknown oblique reverse faults and were within 3mi (4.8km) of the M6.9 Loma Prieta mainshock epicenter, near the intersection of the San Andreas and Sargent faults. Supported by. There is nothing different about a cave that would make it immune to the shaking from an earthquake. These features include dikes, craters, vented sand, sills, and laterally spreading landslides. Bryant Gumbel, Jane Pauley and Deborah Norville anchored from Chicago (where they had planned to originally do a special celebratory edition), with reports done by Bob Jamieson and Don Oliver in San Francisco, and George Lewis in Oakland. Loma Prieta and other nearby mountain peaks are pushed upward by local collision forces associated with a left bend in the San Andreas fault. trailer <>startxref 0 %%EOF 50 0 obj <>]/Pages 39 0 R/Type /Catalog/Version /1.4/ViewerPreferences <>>> endobj 64 0 obj <> stream Because of its proximity to the San Francisco Bay Area, the earthquake 0000001710 00000 n Seismologists quickly determined that the epicenter of the October 17 earthquake was in the Santa Cruz Mountains, near a peak named Loma Prieta (in Spanish, dark hill). The third earthquake, a 2.7, occurred at 1:59 p.m., according to the USGS. The largest recorded earthquake-induced offset in a well is a one meter rise. [13], In early 1988, the Working Group for California Earthquake Probabilities (WGCEP) made several statements regarding their forecasts for the 225mi (360km) northern San Andreas Fault segment, the 56mi (90km) San Francisco Peninsula segment, and a 18.822mi (3035km) portion of that segment which was referred to as the southern Santa Cruz Mountains segment. 49 0 obj <> endobj xref 49 16 0000000016 00000 n 0000001995 00000 n The 1989 Loma Prieta earthquake occurred on California's Central Coast on October 17 at 5:04 p.m. local time. Because it happened during a national live broadcast of the 1989 World Series, the annual championship series of Major League Baseball, taking place between Bay Area teams San Francisco Giants and the Oakland Athletics, it is sometimes referred to as the "World Series earthquake", with the championship games of the year being referred to as the "Earthquake Series". The ground was unconsolidated rock, so seismic waves got through easier, causing more disruption. From 1955 to 2005, the mountain was the longtime site for the transmitter tower of San Jose television station KNTV. However. [42] A Goodyear Blimp had already been overhead to cover the baseball game, and ABC used it to capture images of damage to the Bay Bridge and other locations. [37] In Moss Landing, the liquefaction destroyed the causeway that carried the Moss Beach access road across a tidewater basin, damaged the approach and abutment of the bridge linking Moss Landing spit to the mainland and cracked the paved road on Paul's Island. Power was restored to most of San Francisco by midnight, and all but 12,000 customers had their power restored within two days. Here is a brief list. [78] Large cracks in Oakland's runway and taxiway reduced the usable length to two-thirds normal, and damage to the dike required quick remediation to avoid flooding the runway with water from the bay.

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